Chicago researchers investigate the irresistible smartphone temptation, why organs don’t always go to the neediest patients, whether evolution happens head first or tails first, and how long hypertension patients have to get their blood pressure under control.

Readers debate dean of students in the College John Ellison’s letter to the Class of 2020; discuss voter education and the merits of capitalism; share memories of historian William H. McNeill, LAB’34, AB’38, AM’39, track coach Ted Haydon, LAB’29, PhB’33, AM’54, and the beloved T-Hut; and more.